Euclid Assessment Study Report for the ESA Cosmic Visions
R. Laureijs, et al. (Euclid Science Study Team)

TL;DR
Euclid is a proposed space mission designed to map the universe's dark components using high-precision imaging and spectroscopy, aiming to measure galaxy shapes, redshifts, and cosmic structures over a vast area.
Contribution
This report details the assessment study of Euclid, outlining its scientific goals, mission design, payload, and data management plans for probing dark energy and dark matter.
Findings
Euclid will survey 20,000 deg2 of the sky.
It will measure shapes and redshifts of over 2 billion galaxies.
The mission aims to constrain dark energy parameters with high precision.
Abstract
Euclid is a proposed high-precision survey mission to map the geometry of the Dark Universe with demonstrated feasibility. Euclid's Visible - Near-InfraRed imaging and spectroscopy of the extragalactic sky will further produce extensive legacy science to the boundaries of the visible universe. The mission is optimised for two primary cosmological probes: Weak gravitational Lensing (WL) and Baryonic Acoustic Oscillations (BAO). Euclid's wide survey will cover 20,000 deg2, measuring shapes and redshifts of galaxies to redshift 2. For weak lensing, Euclid will measure the shape of over 2 billion galaxies with a density of 30-40 resolved galaxies per arcmin2 in one broad visible R+I+Z band (550-920 nm) down to AB mag 24.5 (10sigma). The photometric redshifts for these galaxies are derived from three additional Euclid NIR bands (Y,J,H in the range 0.92-2.0 micron) reaching AB mag 24 (5sigma)…
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Taxonomy
TopicsAstronomy and Astrophysical Research · Adaptive optics and wavefront sensing · Stellar, planetary, and galactic studies
